Well tubing anchor



A. L. SIMMONS 2,692,648

2 Sheets-Sheet l I INVENTOR. fi/"ahe A. 627777770175 WELL TUBING ANCHOR //AW m3m x Z T g xv Oct. 26, 1954 Filed Jan. 21, 1952 ATTDRN EYS Patented Oct. 26, 1954 WELL TUBING ANCHOR Archie Leon Simmons, Gladewater, Tex., assignor to Sells-Simmons Hydrostatic Bailer Corporation, Gladewater, Tex., a corporation of Delaware Application January 21, 1952, Serial No. 267,392

3 Claims. 1

This invention relates to well tubing anchoring devices, and in particular a plurality of slips pivotally mounted on the end of a sleeve with the slips actuated by a mandril and with the sleeve on which the slips are mounted retained in the set position against the string with latching dogs.

The purpose of this invention is to provide a comparative simple well anchor that may be set to a free position and also to a clamping position from the upper end of the well.

Various types of anchoring devices have been provided, however, it has been found difticult to actuate an anchoring device to holding and releasing positions from the upper end of a well without comparatively complicated construction which makes the well tubing comparatively costly.

With this thought in mind this invention contemplates a Well tubing anchor having a tubular mandrel or well string adapted to be positioned in a well casing or tube in which anchoring means is provided by toggle levers pivotally mounted on the mandrel and sleeves and gripping latches in combination with a spring for controlling the movement of the sleeve on the mandrel.

The object of this invention is, therefore, to provide means for forming a tubing anchor whereby pivotally mounted slips carried by a tubular mandrel provide gripping jaws.

Another object of the invention is to provide a well or tubing anchor that is adapted to be used in combination with tubes or well casings now in use.

A further object of the invention is to provide a toggle well or tubing anchor which is of a simple and economical construction.

With these and other objects and advantages in view the invention embodies a tubular mandrel having slots therein in a well casing or tubing with toggle levers providing slips pivotally mounted in the mandrel and positioned in said slots, a spring actuated sleeve on the end of which the toggle levers are pivotally mounted, latches adapted to retain the parts in assembled relation, and a latch jack for releasing the device.

Other features and advantages of the invention will appear from the following description taken in connection with the drawing, wherein:

Figure 1 is a vertical section through a tubular casing of a Well illustrating the position of the anchor therein with the parts in the set positions.

Figure 2 is a similar view illustrating a latch jack positioned on the latching levers and also showing the parts in the set position.

Figure 3 also shows a view similar to that shown tube anchor of this invention includes a mandrel l0, slips l I pivotally mounted on pins 29 pivotally connecting upper toggle levers i2 and lower toggle levers IS, a sleeve l4 slidably mounted on the mandrel and urged toward the position ofholding the slips in locking engagement with a well casing [5 by a spring l6, latches I! for holding the sleeve with the spring compressed and the slips released and a latch jack 18 for actuating the latches to released positions.

The mandrel I0 is provided with elongated slots l9 and 20 through which re-setting shoulder 2| on the upper end of the sleeve l4 extend and, as

illustrated in Figure l the latches I! which are pivotally mounted on pins 22 extend through the lower ends of the slots with the lover surfaces of the latches positioned to substantially engage the beveled surfaces 23 in the lower ends of the slots.

One pair of the toggle levers is positioned in the upper end of the slot l9, as shown in Figure l with the upper lever l2 pivotally mounted by a pin 24 in the slot and with the lever l3 pivotally mounted by a pin 25 in a recess 26 in the upper end of the sleeve 14.

The mandrel I0 is also provided with slots 21 and 28 in which toggle levers, similar to the levers I2 and I3 are positioned and, as illustrated in the drawing slips I l are pivotally mounted on the toggle levers with pins 29.

The mandrel Ill is also provided with an annular shoulder 30 upon which the lower end of the spring [6 is positioned, and it will be appreciated that in setting the device for positioning in anchoring in a well tube or casing the latches I! hold the spring I6 compressed with the slips H in released position and with the anchor in a desired position in the well casing the latches H are actuated by a latch jack, such as the jack illustrated in Figure 6 whereby upward movement on the inner end of the latches first compresses and then releases the spring so that the spring urges the sleeve l4 upwardly with the toggle levers forcing the slip into engagement with the inner surface of the well casing, as illustrated in Figure 3. Upon upward movement of the mandrel the shoulder 30 compresses the spring I6 and the latches are dropped by gravity to the horizontally disposed position shown in Figures 1 and 2 whereby the slips are drawn away from the inner surface of the Well casing.

As illustrated in Figure 6, the latch jack I8 is formed with a slot 3| that is positioned to receive the latches l'l. Legs 32 and 33 at the sides of the slot 3| are provided with slots 34 and 35, respectively in which a latch 36 is positioned and with one end of the latch pivoted by a pin 3'; in the slot 35 the latch is free to swing upwardly and the latch jack is dropped over the latches l1. After the latch jack has dropped below the latches, as shown in Figure 2 the latch 36 drops downwardly to a position below the latches ll, whereby as the latch jack is drawn upwardly the latches I? are again actuated, as illustrated in Figure 3.

The upper end of the latch jack is provided with a threaded stud 38 to which a cable 39 may be attached by a coupling 40.

In the design shown the sleeve is formed in two semi-circular sections, as illustrated in Figures 4 and 5.

With the parts arranged in this mamier the slips II which are provided with serrated faces whereby they are adapted to grip in both directions providing two way slips and which are carried by the toggle or slip bars are actuated by the spring it when the sleeve 14 is released by the latches ll to grip the inner surface of the wall casing l5 whereby the mandrel is retained in position by the locking elements.

In use, the mandrel I is inserted in the well casing with the parts in a set position as illustrated in Figures 1 and 2 and when it is desired to anchor the mandrel the latch jack is dropped through the mandrel so that the legs 32 and 33 pass over the latches ll until the latch 36 drops by gravity and the latch 36 extended below the latches ll the latch jack is drawn upwardly by the cable, actuating the latches IT to the position shown in Figure 3 whereby the sleeve is released and the spring forces the slips into engagement with th well casing.

Upward movement of the mandrel the sleeve again compresses the spring [6 until the sleeve is held by the latches I! and with the pins 2 5 of the upper latch or toggle bars l2 moved upwardly the slips i l are drawn inwardly to released positions.

It will be understood that modifications may be made in the design and arrangement of the parts without departing from the spirit of the invention.

What is claimed is:

l. A well tube anchor comprising a tubular mandrel having radially disposed slots therein, upper toggle levers pivotally mounted in some of the slots of the mandrel, a sleeve slidably mounted on the mandrel, said sleeve having shoulders extended inwardly and said shoulders positioned in the slots in which the upper toggle levers are positioned, lower toggle levers pivotally mounted on said sleeve and positioned in the slots of the mandrel in which the upper toggle levers and shoulders are positioned, pins pivotally connecting the upper ends of the lower toggle levers to the lower ends of the upper toggle levers, slips pivotally connected to the upper and lower toggle levers by the pins connecting the levers, said slips facing outwardly of the mandrel, resilient means on the mandrel for urging said sleeve upwardly, latches pivotally mounted in the mandrel for retaining the sleeve in a downwardly disposed position, and means for actuating the latches from the upper end of the well tube for releasing the sleeve.

2. A well tubeanchor comprising a tubular mandrel having radially disposed slots therein, upper toggl levers pivotally mounted in some of the slots of the mandrel, a sleeve slidably mounted on the mandrel, said sleeve having shoulders extended inwardly and said shoulders positioned in the slots in which the upper toggle levers are positioned, lower toggle levers pivotally mounted on said sleeve and positioned in the slots of the mandrel in which the upper toggle levers and shoulders are positioned, pins pivotally connecting the upper ends of the lower toggle levers to the lower ends of the upper toggle levers, slips pivotally connected to the upper and lower toggle levers by the pins connecting the levers, said slips facing outwardly of the mandrel, said mandrel having an annular shoulder on the outer surface and said shoulder spaced below the slots of the mandrel, a spring positioned on the shoulder of the mandrel and extended around the mandrel, latches pivotally mounted in the mandrel for retaining the sleeve in a downwardly disposed position, and means for actuating the latches from the upper end of the well tube for releasing the sleeve.

3. A well tube anchor comprising a tubular mandrel having radially disposed slots therein, upper toggle levers pivotally mounted in some of the slots of the mandrel, a sleeve slidably mounted on the mandrel, said sleeve having shoulders extended inwardly and said shoulders positioned in the slots in which the upper toggle levers are positioned, lower toggle levers pivotally mounted on said sleeve and positioned in the slots of the mandrel in which the upper toggle levers and shoulders are positioned, pins pivotally connecting the upper ends of the lower toggle levers to the lower ends of the upper toggle levers, slips pivotally connected to the upper and lower toggle levers by the pins connecting the levers, said slips facing outwardly of the mandrel, resilient means on the mandrel for urging said sleeve upwardly, latches pivotally mounted in the mandrel and extended into slots in the sleeve, for retaining the sleeve in a downwardly disposed position, a latch jack suspended by a, cable in the mandrel,

said latch jack having spaced depending legs, a latch pivotally mounted in one of the legs of the latch jack and extended into a slot in another of said legs, said latch of the latch jack being adapted to pass over the latches pivotally mounted in the mandrel upon downward movement of the latch jack with the legs thereof straddling the latches pivotally mounted in the mandrel and adapted to drop to operative position for actuating the latches of the mandrel to release the sleeve upon upward travel of the latch jack.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,122,754 Rohrbaugh July 5, 1938 2,490,350 Grable Dec. 6, 1949 

